Torsion balance-scale.



M. MUNZNER.

TORSION BALANCE SCALE.

APPLICATION FILED AUG. 12, 1912.

Patented Dec. 22, 1914.

3- SHEETS-SHEBT 1.

INVENTOR WITNESSES:

[HE Nome/5 PEIERS co Pnom-r THO M. MUNZNER. TORSION BALANCE SCALE.APPLICATION FILED AUG. 12, 1912;

1,121,861. Patented D6C.22,1914

3 SHEETS-SHEBT 2.

INVENTOR WITNESSES:

By 4 ilwmyx,

HE NORRIS PEr/ERS CO. PHOTL7-LITHI1 WASHINGTON. 1).

M. MUNZNER.

TORSION BALANCE SCALE.

APPLICATION FILED AUG. 12, 1912;

Patented Dec. 22, 1914.

3 SHEETS-SHEET 3.

INVENTOR Z;

WITNESSES:

THE NOR kIS PETERS CCL, PHoTo-LITHQ. WASHINGTON. D. C.

UNITED STATES PATENT @FFIQE.

MAX MUNZNER, OF ARLINGTON, NEJV JERSEY, ASSIGNOR TO THE TSRSION BALANCECOMPANY, OF NEJV YORK, N. 1., A CORPQR'ATION 01? NEW TORSIONBALANCE-$CALE Application filed August 12, 1912.

T 0 all 107101.. it may concern Be it known that I, MAX MUNZNER, acitizen of the United States, residing at Arlington, in the county ofHudson and State of New Jersey, have invented certain new and usefulImprovements in Torsion Balance-Scales, of which the following is aspecification.

This invention relates to scales or balances of the torsion type, thatis to say, those in which either the fulcrum or the scale pan (oreauivalent) connections of the scale beam or balance beam are made bymeans of a stretched wire or ribbon which may twist slightly with therocking movements of the beam, such wire serving in place of the usualknife edge bearings. It is necessary that such wire or ribbon(hereinafter called a wire) be stretched tightly, and this has commonlybeen done by carrying the wire around a truss frame of metal, joiningits ends, and then stretching the wire to the desired tension by peeningthe metal of the frame whereby to enlarge such frame. In other cases thetruss frame or other part on which the wire was stretched has been bentto receive the wire, and on elastically resuming its normal form itstretches the wire.

The present invention aims to improve upon these methods and render thetension wire readily adjust-able at will, whereby to insure greateruniformity in the tension imparted to the wires than heretofore, and tofacilitate varying such tension.

It also aims to facilitate the adjustment of the scale.

In some instances the Wire is stretched upon a truss frame separate fromthe beam, and in other cases it is stretched upon a truss frame carriedby or forming part of the beam itself. In either case the part carryingthe wire is formed or provided with adjusting means for varying at willthe tension of the wire, such means consisting preferably of a screwengaging the Wire and the wire-carrying part, and arranged to push ordraw the inactive portion of the wire more or less out of line andthereby to draw taut the active portion thereof and give it the desiredtension.

In torsion balance scales it has been usual to mount the parallelbalance beams upon upper and lower fulcrum wires of a fixedly mountedtruss, and to connect their free ends Specification of Letters Patent.

Patented Dec. 22, 1914.

Serial No. 714,595.

respectively by engaging them to the upper and lower wires of movabletrusses arranged in vertical planes, and these trusses have carried theposts on which the scale pans are mounted. The present inventionprovides a different and improved construction wherein the opposite endsof the two beams are the wire carrying parts, and the uprights carryingthe scale pans are hung directly upon the wires carried by such beams.

Referring to the drawings,Figures l and 2 are respectively a plan andside elevation, the latter partly broken away in vertical section, of atorsion balance scale constructed according to my invention; Fig. 3 is avertical transverse section thereof; Fig. 4 is a perspective view of anadjusting screw and nut; Fig. 5 is a fragmentary section of the screwand nut and the portion of beam engaged thereby; Fig. 6 is a fragmentaryplan of this portion of the beam, the screw and nut having been removed;Fig. 7 is a partial side elevation, and Fig. 8 an end elevation ofanother construction; Fig. 9 is a fragmentary section showing theadjusting screw and nuts used in Fig. 8; Fig. 10 is a plan of a trussframe which constitutes a scale beam; Fig. 11 is a side view thereof;Fig. 12 is an enlar ed fragmentary section showing means for adjustingthe alinement of the active portion of the tension wires.

In the drawings A is the base, which may be of any usual or suitableconstruction, B is the fulcrum frame fixed thereon, C is the fulcrumtruss, D D are the upper and lower scale beams, E E are the scale pans,and F F are the upright supports for the latter. The beams D and D arehung as usual upon the tension wires a a of the truss C.

In Figs. 1 and 2 the beams D D are shown as widened or branchedlaterally at their ends, and provided with studs or projections 2) 5around which are passed the tension wires 0 c. The upright frames orposts F are fastened by clamping or otherwise to the middle portions ofthe stretched wires 0 0. This construction takes the place of the usualupright trusses which in the ordinary construction carry the uprightsupports for the pans, such construction being generally of thecharacter shown in Figs. 7 and 8.

For stretching the wires 0 0 these are acted upon by adjustable screws(5 d moved screw advances.

by nuts 6 e. In the construction shown, each of the wires is engaged inits inactive part by one of the screws d, and the latter is propelled byturning a nut until it displaces the wire sufficiently out of line tostretch it to the desired tension.

in the construction shown in Figs. at, 5 and 6 the screw islongitudinally slotted, leaving its head intact. The wire 0 is enga edby the end of this slot next the head; the screw is caused to straddlethe thickness of-the beam, as shown in Fig. 5, the nut 6 being firstintroduced into a socket e in the beam (see Fig. 6) and being turned asthe By this means the screw is prevented from turning by the engagementof its slot with the beam, while the nut turns freely on the screw andby bearing against one side of the socket 6 draws the screw against thetension of the wire until the latter is stretched to the desiredtightness. The same adjustment may be applied to the tensional wires 0.of the fixed truss C, where the adjusting parts are of identicalconstruction and marked with the same letters.

In Figs. 7 and 8 a different adjustment is shown wherein the adjustingscrew instead of pulling the wire out of line acts to push it andthereby to stretch it. The screw cl is slotted as before and has a slotor notch 7 formed in its outer end to receive the wire. The long slot ofthe screw straddles the truss. The screw is adjusted endwise by turningnuts 6 which are in the form of disks engaging the screwthreads andscrewing against the opposite sides of the truss frame G. Fig. 8 showshow the wire a is stretched by being forced out of line.

Preferably the adjusting means engages what I have called the inactiveportion of the wire, as distinguished from the active portion, thelatter being that which is stretched between the two points of supportof the wire-carrying part or truss, and which between these pointsreceives the other part, as to which the wire serves in lieu of apivotal connection.

Figs. 10 and 11 show a construction wherein the truss around which anendless wire is stretched becomes the scale beam. The rigid truss orbeam is lettered D This is given a fulcrum pivot on the axis 00 ain anyknown way, preferably by mounting it upon the middle of a stretched wirea, which is carried by a fixed truss in the manner snown with referenceto the truss C in Fig. 3. Around the frame or truss D is carried asingle endless wire 9 which as shown is stretched over four studs 6 7)by the action of adjusting screws at (Z, which may be adjusted by asingle nut, as shown in Fig. 9, or otherwise. The result of thisadjustment is that the active portions of the wire 9 g which arestretched across the ends of the beam and extend parallel to the axiswire a, are stretched by the adjustment of either or both of the screwsd.

It is important to be able to adjust ac curately the active portions ofthe tension wires at opposite ends of the beam to bring such portionsinto exact parallelism with the pivotal axis of the beam, and in thecase of an even balanced beam to bring the wires at opposite endsequally distant from such axis. For this adjustment my inventionprovides special adjusting means for initially locating the activeportions of the wire by setting the studs 6 Z) toward or from thefulcrum axis. The studs 6 b are connected to the truss or beam with aslotted or lost motion connection, and a screw it is applied to eachstud for determining its adjustment toward or from the pivotal axis. InFig. 12, D is the body of the beam or truss, b is the stud, and c is thewire. The stud b has a neck or shank i which is capable of sliding in aslot j in the beam. The adjusting screw it passes through the outer endof the beam and enters a threaded socket in the neck 2'. The stud isheld firmly in place by a lock-nut la. To make the adjustment, the nutis is slackened and the screw it turned in either direction to move thestud 6 out or in. Inasmuch as the wire is stretched in one direction thescrew it need act only in the contrary direction.

In adjusting the scale the studs Z) 5 are located in approximatelycorrect positions, the wire is applied, the adjusting screw for the wireis tightened only enough to give the wire its minimum tension, andthereupon after the parts of the scale are as sembled, minutemeasurements are taken to determine whether the stretched activeportions of the wire are in precise parallelism with the axis and areprecisely equidistant therefrom, any deviation being corrected by properadjustment of the screws h it until the stretched active portions of thewires are brought to precisely the correct adjustment. Such adjustmentmay in some in stances involve a readjustment of the wire stretchingscrew. Afterthe preliminary locational adjustment of the wires has beenaccomplished, the tensional adjustment is made to stretch them to theproper degree, which is accomplished as already described by properadjustment of the wire tightening screw 0? or d.

It is to be understood that the invention is not limited to a pan scale,either upright orsuspended, nor to a scale having parallel balancedbeams, either even-balanced or otherwise, nor to a scale the beams ofwhich are mounted above a supporting base or platform, as these featuresmay be replaced by any of the well known equivalents therefor, thesubstitution of which in this art is well understood.

The invention is applicable whatever may be the part which carries thewire, whether it be a stationary truss, a movable truss, a trussindependent of the beam, a truss forming part of the beam, or a trussconstituting the entire balance beam.

I claim as my invention 1. In a balance, an endless tension wire, a partcarrying said wire, a part carried by said wire, and a screw adjustmentengaging one of said parts and engaging the wire for deflecting it andthereby varying at will the tension on said wire.

2. In a balance, a tension wire,

a part carr 1n said wire a part carried by said wire, and adjustingmeans for varying at will the tension on said wire comprising a slottedthreaded rod engaging the wire, and a nut screwing thereon and engagingsaid carrying part.

3. In a balance, a tension wire, carrying said wire, a part carried bysaid wire, and adjusting means for varying at will the tension on saidwire comprising a slotted threaded rod engaging the wire and receivingsaid carrying part in its slot, and a nut screwing on said rod andengaging said carrying part.

4. In a balance, a truss, an endless tenion wire stretched around saidtruss, and adjusting screws on opposite sides of said truss engaging theinactive portions of the wire, and deflecting such portions to vary thetension of the wire.

5. In a balance, a tension wire, a part carrying said wire having studsaround which said wire is carried in a determined plane, and means foradjusting such studs in a direction in said plane perpendicular a partto the direction of the active portion of the wire whereby to change thealinement of the wire or displace it bodily.

6. In a balance, a tension wire, a part carrying said wire, studscarried by said part between which the wire is stretched, and means foradjusting either of said studs in a direction perpendicular to such studand transverse to the direction of the stretched wire whereby to varythe location of the wire.

7. In a balance, a tension wire, a truss, studs carried by said trussbetween which the wire is stretched, and screws for adjusting said studsin a direction transverse to the direction of the stretched wire,whereby to adjust bodily the location of the wire.

8. In a balance, a tension wire, a truss, studs carried by said trusshaving a sliding engagement therewith and between which studs the wireis stretched, and adjusting screws for'displacing said studs to bodilyadjust the wire.

9. In a balance, a pivoted truss beam on a horizontal axis, studscarried thereby, a wire stretched horizontally between said studs in adirection approximately parallel with the pivotal axis, and means foradjusting said studs transversely to the direction of the stretched wirewhereby to displace said wire toward or from such axis.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

MAX MUN ZNER.

Witnesses C. G. MIooHALIs, GEORGE M. CONWAY.

Copies 01' this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. 0.

